After losing 0.02 BTC to ponzi games and reading some of the threads here, it seems that the ponzi games here end extremely quickly. A game that is designed to last a week such as WeeklyPonzi.com might only really last for an hour or so. It is common for those who deposited only a couple of hours after a game has started to not see any return at all. A game that is designed to last for 24 hours might only see those who deposited within the first 10-20 minutes make a profit.
From the payment list of Week #3, it seems the last deposit getting paid is the one made just 10 seconds after the round started lol.